Peters



(No Model.)

J. A. CAMPBELL. LATCH AND LOOK COMBINED.

Patented Apr. 16, 1889.

IiqQEL E m-{EL MJW ATENT trier).

JOHN ARCHIE GAh'lPliELL, OF ELLIS, KANSAS, ASSIGNOR T0 HIMSELF AND F..T. BEST, OF SAME PLACE.

LATCH AND LOCK COlillBlNED.

SPECIFICATION forming part of Letters Patent No. 401,540, dated April16, 1889.

Application filed April 7, 1888. Serial No. 269,932. (No model.)

To all whom it may concern.-

Be it known that 1, JOHN ARCHIE CAMPBELL, of Ellis, in the county ofEllis and State of Kansas, have invented certain new and usefulImprovements in Latches and Locks Combined; and I do hereby declarethatthe following is a full, clear, and exact description thereof,reference being had to the accompanying drawings, and to the letters ofreference marked thereomwhich form part of this specification, in whichFigure 1 is a side view of the lock with one side plate removed,showingthe tumblers disengaged. Fig. 2 is a similar view, showing the tumblersengaged. Fig. 3 is a horizontal sectional view showing the knobattachments. Fig. at is a detail.

This invention is an improvement in locks; and its objects are toprovide a gravitating catch, to improve the knob attachments and themanner of operating the catch from the handles, and, further, to providedevices for locking the catch, all of which will be evident from thefollowing description, in connection with the drawings, and is conciselystated in the claims hereto annexed.

In the drawings, A represents the case of the lock, which, asrepresented, is a mortiselock, having the removable side a secured inposition by a screw, B, engaging a threaded socket in a lug, b, of caseA, as shown.

C is the face-strip of the ease, provided with perforations for thepassage of retaining screws an d with the latch-opening c, as shown.

D represents the main tumbler, which occupies nearly the entire casing,having just sufiicient room therein to move on. its pivot (Z, near thelower inner end of the case, as shown. The interior of this tumbler iscut out to ac commodate lug b and a locking-tumbler, G, and thekey-head, hereinafter described.

At the upper outer corner of tumbler D is the latch-head E, which playsthrough opening 0 as the tumbler is shifted on its pivot. The part ofthe tumbler below latch E is enlarged, as shown, to weight the tumblerand cause it to drop by gravity when lifted and released, so that thelatch will beheld normally projected out of the case in position toengage the keeper. The latch-head is preferably made separate fromtumbler D and pivoted thereto, as shown, so that it can be secured tothe tumbler to face right or left, according to the swing of the door.\Vhen the latch-head engages the keeper, its beveled face causes thehead to move inward, thereby oscillating tumbler D on its pivot; but assoon as the latch-head disengages the head of the keeper the weightedtumbler projects it out of the casing, as before. It will be seen thatthe tumbler is shouldered at c below latch E to accommodate theoscillation of the latter, and this shoulder supports the head when itis forced back into the casing.

F is a lug, preferably rectangular in crosssection. secured in thecasing within the opening of tumbler D and in front of and above lug Z).

G is a locking-tumbler placed on high and having a slot, g, whichpermits it to have a degree of longitudinal play thereon, one end ofsaid lockingtumbler projecting over lug Z), and the other end is beveledinto a tooth, ll, which is adapted to be engaged with a correspondingnotch, f, formed in the adjoining inner edge of tumbler D, as shown.

Below tumbler G is formed the key-opening, and the edge of the tumbler Gadjoining this opening is formed with teeth 71 t", which the head of thekey I engages to shift the tumbler GI J is a spring-plate placed on lugF outside. tumbler G, and which when side a is secured in place preventstumbler G from jarring into or out of engagement with tumbler D. Thisplate has an edge, j, which engages a corresponding shoulder, K, oftumbler G, when the latter is thrown into engagement with the tumbler D,as shown, and prevents the casual disengagement of tumbler G therefrom.

The operation of these parts is, briefly, as follows: The parts being inproper position and looked, as shown in Fig. 2, the key is inserted andturned, so that its head I will engage the tooth t" of tumbler G. Thisheadis 95 provided with a rounded shoulder, 7;, which is adapted toengage and raise the end of plate J until the latter is clear ofshoulder K previous to the contact of headl and tooth i. The furtherturning of the key forces tumbler I0 G back until it disengages tumblerD, leaving the latter free to operate, as described. Then when it isdesired to engage the tumblers the key is inserted and turned in theopposite direction, engaging tooth 71 of tumbler G, forcing the latteroutward into engagement with tumbler D, as shown, and letting plate Jautomatically engage shoulder K. This shoulder on the tumbler G is notabsolutely necessary, as the tumblers would be securely engaged withoutthe use of plate-J; but this plate prevents casual shifting of tumbler Gon its lug, and the plate engaging the shoulder requires a key to beused that will lift the plate before moving the tumbler. Only onetumbler, G, is shown, but in practice two or more may be employed havingirregular teeth, so that different-headed keys will be required foreachlock; but all of these modifications act upon the principledescribed, and would not depart from the es sential features of myinvention.

L L are knob-spindles having angular inner ends, I I, which pass throughcorresponding angular openings in plates M M, secured on opposite sidesof the door and lock, as shown in Fig. 3, the spindles being keyed toprevent their escape from said plates, as shown. The inner ends of thesespindles are beveled and enter the lock-case through suitable openingsin the side plates at points near and above the pivot of tumbler D, thesaid beveled ends entering the openings of said tumbler and impingingagainst its inner edge by their beveled faces, while their plain facesrest against the side of lug I). Now, when either spindle is pushedinward its beveled end wedging between lug b and the adjoining face ofthe tumbler D will force the latter to oscillate on its pivot, as isevident, thus throwing the latch-head inward and disengaging it from itskeeper. When the spin dles are retracted, the latch will be projectedfrom the lock, as before described. In order to retract the spindles, Iemploy coiled springs N, placed on a reduced portion of the spindlesbetween shoulders or thereof and the plates M, whereby the spindles areforced outward.

O O are the knob-handles, which may, if

'desiregl, be loosely mounted on spindles L L, so that they can revolvethereon and the spindles play freely therethrough, or preferably theknobs are rigidly attached to plates M M, so that they support thespindles in proper horizontal positions.

The spindles are independent of each other, and by omitting one the lockcan be conveniently employed as a night-latclr Having describedmyinvention, I claim 1. The combination of the gravitating tumbler D,pivoted at its lower inner corner and having a latch-head at its upperouter corner and shouldered on its interior edge,substantially asdescribed, with an adjustable locking-tumbler within the gravitatingtumbler adapted to engage the shoulder thereof to lock the same, and aspindle for oscillating the gravital tumbler, substantially asspecified.

2. The combination of the pivoted tumbler D, with a knob-spindle havinga beveled end engaging said tumbler and adapted to oscillate the tumblerwhen pushed inward, and the spring for retracting said spindle,substantially as described.

3. In a lock, the combination of the pivoted tumbler D and movabletumbler G, located inside said tumbler, with a'sliding knob-spindle, L,engaging tumbler D, and the spring controlling said spindle, allsubstantially as and for the purpose described.

4C. The combination of the pivoted weighted tumbler D and its latch-headwith the slotted sliding tumbler G, and the spring-plate J,

V mounted on and adapted to lock said tumbler G, all constructed andarranged substantially as described.

5. In a lock, the combination of the casing having lug F, the pivotedtumbler D, latchhead E, and the slotted tumbler G, mounted on lug F, andits spring-plate J, with the knobplates M M, the spring-controlledknob-spindles L L, and knobs 0, all constructed and arranged to operatesubstantially in the manner and for the purpose described.

6. The combination of the casing having a lug, b, and the pivoted hollowtumbler D therein, with the knob-spindles L L, having flattened andbeveled inner ends bearing against the lug b and engaging tumbler D whenpushed inward, and the springs controlling said spindles, allsubstantially as and for the purpose described.

7. The combination of the casing having a lug, F, and a tumbler, D,pivoted at its lower inner corner in the casing and having a latch atits upper outer corner and shouldered on its interior near said latch,with the sliding toothed locking-tumbler G, mounted on lug F, and thespring-plate J on lug F, adapted to lock tumbler G, and the spindles foroscillating tumbler D, all substantially as specified.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

J. Anomn CAMPBELL.

IVitnesses:

L. 0. Ross,

\V. P. l-IAMILToN.

